Rename and update

js/id/controller/controller.js

@@ -0,0 +1,22 @@
+// A controller holds a single action at a time and calls `.enter` and `.exit`
+// to bind and unbind actions.
+iD.Controller = function(map) {
+    var event = d3.dispatch('enter', 'exit');
+    var controller = { mode: null };
+
+    controller.enter = function(mode) {
+        mode.controller = controller;
+        mode.map = map;
+        if (controller.mode) {
+            controller.mode.exit();
+            event.exit(controller.mode);
+        }
+        mode.enter();
+        controller.mode = mode;
+        event.enter(mode);
+    };
+
+    controller.enter(iD.modes.Move);
+
+    return d3.rebind(controller, event, 'on');
+};